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RT9742KNGV

Description
IC USB POWER SWITCH SOT23-3
Categorysemiconductor    Power management   
File Size295KB,18 Pages
ManufacturerRichtek Technology Corporation
Websitehttps://www.richtek.com/
Environmental Compliance
Download Datasheet Parametric View All

RT9742KNGV Overview

IC USB POWER SWITCH SOT23-3

RT9742KNGV Parametric

Parameter NameAttribute value
Switch typeUSB switch
Number of outputs1
Ratio - Input:Output1:1
Output configurationhigh-end
Output typeN channel
interfaceswitch
Voltage - Load2.7 V ~ 6 V
Voltage - Power Supply (Vcc/Vdd)unnecessary
Current - Output (maximum)1.5A
On-resistance (typ.)70 milliohms
input typenon-inverting
characteristic-
failsafeCurrent limit (fixed), over temperature, reverse current, UVLO
Operating temperature-40°C ~ 85°C(TA)
Package/casingTO-236-3,SC-59,SOT-23-3
Supplier device packagingSOT-23-3
®
RT9742
70mΩ/55mΩ, 3A/2.5A/2A/1.5A/1A/0.5A High-Side Power
Ω
Ω
Switches with Flag
General Description
The RT9742 is a cost-effective, low-voltage, single
N-MOSFET high-side Power Switch IC for USB application.
Low switch-on resistance and low supply current are
realized in this IC.
The RT9742 integrates an over-current protection circuit,
a short fold back circuit, a thermal shutdown circuit and
an under-voltage lockout circuit for overall protection.
Besides, a flag output is available to indicate fault
conditions to the local USB controller. Furthermore, the
chip also integrates an embedded delay function to prevent
miss-operation from happening due to inrush-current. The
RT9742 is an ideal solution for USB power supply and
can support flexible applications since it is available in
TSOT-23-5, TSOT-23-5 (FC) and SOT-23-3 package.
Features
70mΩ/55mΩ (typ.) N-MOSFET Switch
Ω
Ω
Operating Range : 2.7V to 6V
Reverse Blocking Current
Under Voltage Lockout
Deglitched Fault Report (FLG)
Thermal Protection with Fold-back
Over Current Protection
Short Circuit Protection
UL Approved
E219878
Nemko Approved-NO87949
Applications
USB Peripherals
Notebook PCs
Pin Configuration
(TOP VIEW)
VIN
5
2
EN/EN
4
3
VOUT
5
2
EN
4
3
VOUT
5
2
VIN
4
3
GND
3
2
VOUT GND FLG
 
VOUT GND VIN
 
EN GND FLG
 
VIN
VOUT
 
TSOT-23-5 /
TSOT-23-5 (FC)
TSOT-23-5
For RT9742M only
TSOT-23-5
For RT9742U only
SOT-23-3
Simplified Application Circuit
USB Controller
Supply Voltage
2.7V to 6V
C
IN
VIN
FLG
Over-Current
 
RT9742
Chip Enable
EN/EN
VOUT
+
C
OUT
V
BUS
D+
D-
GND
GND
Data
Copyright
©
2017 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS9742-07
June 2017
www.richtek.com
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